Best answer: I think its both.
It definitely a habbit. not saying bad or good. But when people turn to veganism, many report that they accidentally or absent-mindedly eat some meat without thinking about it.
And there is some evidence that it is an addiction. Maybe physical and most likely emotional or mental.
Again, when people go vegan they often report cravings for meat. Mostly these are cravings based on emotions and nostalgia.
But I think there is some evidence for a physical addiction to meat as well. Maybe not exactly the meat but the properties of the meat. Recent studies using MRIs have shown that the pleasure centers of the brain are activated by the consumption of certain foods. plus dopamine and serotonin levels are increased with the consumption of certain foods. And combing the foods in certain ways increases the effect. The three big ones are fat, salt and sugar. And if you look at a typical hamburger or piece of fried chicken you are seeing large doses of fat and salt.
In one study, they examined people's brains while drinking a latte. they found that the serotonin and dopamine levels were very similar to people high on cocaine. This, of course, explains why the local Starbucks has a line out the door each morning.

Vegans like to act like they re healthier than omnivores.
They often even resort to lying, like when many of them said how humans were meant to be vegans.
While in many cases, vegans are healthier than omnivores, it s not always that way. It can be vice versa.
But there is one, delicious, compound that we all love and that most of use get too much of:
Sugar.
I has on numerous occasions been found to be less healthy than saturated fat.
And sugar has also been found to be the real cause of the spike in obesity, heart disease, diabetes, and so many other symptoms over the last century.
Yet vegans still call omnivores ticking time bombs for these conditions, while simultaneously eating lollipops and Oreos.
What do vegans have to say about that?